I've been compiling useful resources for parents and professionals treating eating disorders. I often recommend the reading below:
Eating Disorder Resources
Physical and Systemic Effects of Malnutrition
Behavioral Symptoms of Eating Disorders
Eating Disorder Presentation to Parent Group: Parents Make Recovery Possible [PDF]
Effects of Starvation – University of Minnesota Starvation Study [PDF]
Useful Links for Parents
Families Empowered and Supporting Treatment of Eating Disorders
Family-based treatment for adolescent eating disorders: A detailed discussion of the data
Maudsley Parents - Family-Based Treatment for eating disorders, anorexia nervosa, and bulimia nervosa
Science Daily - Current research comparing Family-Based Therapy to Individual Therapy